Furnace for steam-boilers



H. GOWELL. Furnace for Steam-Boilers.

No. 223,635. Patentedlarp. 20,1880.

7422-1268666 Tw enwn tl iivwwy N-PETERS. PHOTO-LITHOGRAPHER, WASNINGTON, D 04 UNITED STATES PATENT OFFICE.

HIRAM OOWELL, OF ZANESV ILLE, OHIO.

FURNACE FOR STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent No. 223,635, dated January 20, 1880.

Application filed December 30, 1878.

To all whom it may concern Be it known that I, HIRAM Go'WELL, of Zanesville, in the county of Muskingum and State of Ohio, haveinvented certain new and useful Improvements in Furnaces for Steam- Boilers; and I do hereby declare thefollowing to be a full and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure I is a longitudinal section of a stationary boiler and furnace constructed in accordance with my invention. Fig. 2 is a similar view of a locomotive-boiler.

My invention has for its object to improve the construction and efficiency of furnaces for stationary, portable, or locomotive boilers, whereby they are better adapted for the consumption of smoke and the consequent utilization of the. pioducts of combustion than those commonly in use. I

To this end the invention consists in a Wall at theback of the grate-bars, built up to the boiler or to the top of the furnace, as the case may be, and provided with a series of tapering holes or perforations, for the purpose of breaking up the smoke and products of combustion asthey pass to the rear of the wall and against a deflecting-wall, at which point they are encountered by incoming currents of cold air, thereby producing increased combustion.

In the accompanying drawings, A, Fig. 1, represents a stationary steam-boiler; B, the furnace, and O the wall at the back of the grate-bars, and built up to the boiler. This wall I propose to construct with a series of openings or fines, D D, of any desired form longitudinally or transversely. The smoke and products of combustion from the furnace pass through these openings, and by so doing are broken up, in which condition they are encountered by and commingled with currents of cold air entering through the side 5'openings, E, as shown.

O is a Wall or abutment placed Within the combustion-chamber O of the furnace, in rear of the perforated Wall, for the purpose of guiding and directing the currents of fresh air into the compressed smoke and products of combustion. The smoke is thus deflected and whirled about behind the wall in currents and eddies, and thoroughly mixed with the cold air, and consumed to a greater or less extent, thereby greatly increasing combustion.

To increase the force with which the smoke is discharged through the wall, the openings are made tapering from front torear, so that the smoke shall enter them freely, but be compressed at the instant of its discharge. This arrangement increases therapidity with which the air and products of combustion are commingled, and drives them together farther under the boiler.

The cold air may be taken through the opening E from the outside of the furnace, or it may be supplied from the top or bottom, or from other desirable or convenient points, either directly or through tubing or other conduits.

In Fig. 2 my improvement in thisrespect is shown applied to a locomotive furnace and boiler, in which the openings are formed in an inclined wall or plate constructed in any suitable way, the fresh air being supplied from under the grate or other con venient point.

The Wall may form a support for the roof of many kinds of furnaces, particularly where there are several different arches employed and there is danger of their falling from ex cessive heat.

Having thus described my invention, what I claim as new is a In furnaces, the combination of the imperfora-ted deflecting-wall G with the wall 0, provided with tapering openings D, the openings E, and the combustion-chamber 0 sub stantially as described, and for the purpose set forth.

HIRAM COWELL; I [L. s.]

Witnesses:

ROBERT. GURRAN, H. S. MooDY. 

